Improvement in sand-driers



'pipes b bf, as shown.

UNITED STATES PATENT EEToEa CASPER P. DULL, OF MGVYTOWN, PENNSYLVANIA.

IMPROVEMENT IN ,SAND-DRIERS.

Specification forming partpof Letters Patent No. 177,384, dated May 16,1876; application iled September 4, 1875.

To all whom it may concern:

Be it known that I, GAsPER P. DULL, of McVeytown, in the county of Mifinand State of Pennsylvania, have invented a new and useful Improvement inApparatus for Drying Sand; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to theaccompanying drawing' making part of this specification, in Which-Figure 1 is a top view of my improved sand-drier, the sides being insection to show the arrangement of the pipes. Fig. 2 is a sectional viewof right and left hand threaded quarter-turn.

Like letters of reference indicate like part-s.

My invention relates to apparatus for drynecting with the manifold bymeans of quarter-turns cut with right and left hand screwthreads,whereby the connections are effectua-lly and cheaply made. A

To enable others skilled in the art to make and use my invention I willdescribe its construction and operation.

In the drawing, a represents the upper steam drum or manifold, and b bpipes passing from the drum c to the.stea1ndrum o, which pipes form thebottom or grating of the chamber d for receiving the sand. These pipes Iarrange parallel to each other, leaving a small space between them,through which the sand when dried will fall, and preferably connect saidpipes to the drum a by vertical To the drum a I connect the steam-inletpipe a', and to the drum c the pipe o for carrying off the waste steamand water of condensation. e e form the sides, and j' f the ends, of thechamber cl. The steam-drum a may be inclosed, as shown in the drawing,to form a hopper for feeding in the sand, whereby the sand is'caused tocome first iu contact with the hottest part of the pipes. A

The operation of my improved apparatus is as follows: I place thesand-drier at a slight angle, or incline the pipes forming the bottomthereof, so that the water of condensation may run `down the pipes b binto the drum c land be removed in the usual manner. Steam is admittedthrough the pipe a into the drum or manifold a and passes through theseries i of pipes bb into thedrum c, and thence escapes through thepipes o'. The wet sand is placed upon the pipes b b, and the heat of thesteam in the pipes gradually dries the sand, which, when it is dry,falls through the spaces between the pipes and allows the wet sand tocome in direct contact with the pipes before .it also passes through. Itmay at times be desirable to arrange the drier so that it may be rockedor agitated to facilitate the dis-v charging of the sand.

The advantages of my apparatus are: The sand is dried by a continuousprocess, the sand, as it dries', falling through and making room for thewet sand above. It allows the water of condensation to drain ofi' fromthe steam-pipes, and thus enables me to utilize the full heating-powerof the steam, and as the steam is delivered by the manifold to eachseparate pipe ofthe series there is no liability of the pipes becomingfilled by the accumulated' water of condensation.

As the water of condensationis drained byv the manifold there is noliability of the pipes bursting by freezing in Winter when the apparatusis not in use.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

The combination of the pipes b b, vertical pipes b b', and the manifoldsa o, the pipes b b being connected by/Athe right and left hand threadedquarter-turns, substantially as and for the purpose specified.

In testimony whereof I, the said CASPER P. DULL, have hereunto set myhand.

C. P. DULL. Witnesses AND. REED, JOHN HAMILTON.

